d7bc3c559f864073807734d042eb5d522dc424026bfe2772380e2317dd22b7d3

Analysis

max time kernel
150s
max time network
121s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
24-08-2023 10:32

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General

Target

VAC-BYPASS.pyc
Size

49KB
MD5

25dc5a591c5b120ac755f13295c04fdf
SHA1

9ba08ff5b9c8b255260d5508499837402fe6edd8
SHA256

44f2f2a3bc2e21c5c5b0ab16cc014a37faf71d9fc1ed3526f2f1d719f3a254bb
SHA512

e94cf6ef42adb3d156df5f816ac814116b852d2748fca6a3946cf480dfd14ad218098271c1b85dbac2914f4e2bcfc077325fe748c094cffe606aa2bdc0f1689b
SSDEEP

1536:t9MWn/28/r+5vipuMqK8GRY4GKT10+SffloRvJPODlhLxmUSgeC:pHiUpu7K8iY4GKT1sloRvJP5UaC

Score

3^/10

Malware Config

Signatures

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\.pyc	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\pyc_auto_file\shell\Read	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\pyc_auto_file\shell	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\pyc_auto_file\shell\Read\command	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\pyc_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\""	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\pyc_auto_file\	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\pyc_auto_file	rundll32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_CLASSES\.pyc\ = "pyc_auto_file"	rundll32.exe
Key created	\REGISTRY\USER\S-1-5-21-4159544280-4273523227-683900707-1000_Classes\Local Settings	rundll32.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2988	AcroRd32.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2988	AcroRd32.exe
2988	AcroRd32.exe
2988	AcroRd32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1184 wrote to memory of 2484	1184	cmd.exe	29
PID 1184 wrote to memory of 2484	1184	cmd.exe	29
PID 1184 wrote to memory of 2484	1184	cmd.exe	29
PID 2484 wrote to memory of 2988	2484	rundll32.exe	30
PID 2484 wrote to memory of 2988	2484	rundll32.exe	30
PID 2484 wrote to memory of 2988	2484	rundll32.exe	30
PID 2484 wrote to memory of 2988	2484	rundll32.exe	30

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\VAC-BYPASS.pyc
1⤵
- Suspicious use of WriteProcessMemory
PID:1184
- C:\Windows\system32\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\VAC-BYPASS.pyc
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2484
- - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
    "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\VAC-BYPASS.pyc"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of SetWindowsHookEx
    PID:2988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
1f61eae64edddf54c788fe7c064b0306

SHA1
fe25ee722d56e75fd9315cfe782e6742fe46b1a1

SHA256
07d56253cf8670247e94826e8b4f2e793330307953bf9e9f125cef3d3a0c8c4d

SHA512
3a4b7f860378003986a3c69b829eae23795a7f919626a6eec7578e64415e3c82d40d8091aea9364bfe1a0a21fb58d42e3e8c424a0e11745a0bc223c644b3a8aa

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